U.S. patent number 11,189,194 [Application Number 16/080,618] was granted by the patent office on 2021-11-30 for display panel, display device and method for displaying braille information.
This patent grant is currently assigned to BOE TECHNOLOGY GROUP CO., LTD.. The grantee listed for this patent is BOE TECHNOLOGY GROUP CO., LTD.. Invention is credited to Xiaoliang Ding, Pinchao Gu, Yuzhen Guo, Yanan Jia, Changfeng Li, Wei Liu, Yingming Liu, Pengcheng Lu, Haisheng Wang, Pengpeng Wang, Rui Xu.
United States Patent |
11,189,194 |
Li , et al. |
November 30, 2021 |
Display panel, display device and method for displaying Braille
information
Abstract
The embodiments of the present disclosure provide a display
panel, a display device, and a method for displaying Braille
information. The display panel includes a plurality of scan lines,
data lines, and display circuits arranged at intersections of the
plurality of scan lines and the plurality of data lines. The
display circuit includes a switch configured to be turned on or off
according to a scan signal from the scan line, and a dot element
coupled to the switch. The dot element includes a substrate, an
electrode provided on the substrate, a thermosensitive layer
provided on the electrode, and a dot key arranged on the
thermosensitive layer. The electrode is coupled to the switch, and
configured to be applied with a data signal from the data line when
the switch is turned on. The thermosensitive layer is configured to
be heated by the electrode to protrude the dot.
Inventors: |
Li; Changfeng (Beijing,
CN), Wang; Haisheng (Beijing, CN), Liu;
Yingming (Beijing, CN), Ding; Xiaoliang (Beijing,
CN), Xu; Rui (Beijing, CN), Wang;
Pengpeng (Beijing, CN), Liu; Wei (Beijing,
CN), Guo; Yuzhen (Beijing, CN), Lu;
Pengcheng (Beijing, CN), Jia; Yanan (Beijing,
CN), Gu; Pinchao (Beijing, CN) |
Applicant: |
Name |
City |
State |
Country |
Type |
BOE TECHNOLOGY GROUP CO., LTD. |
Beijing |
N/A |
CN |
|
|
Assignee: |
BOE TECHNOLOGY GROUP CO., LTD.
(Beijing, CN)
|
Family
ID: |
59613620 |
Appl.
No.: |
16/080,618 |
Filed: |
February 2, 2018 |
PCT
Filed: |
February 02, 2018 |
PCT No.: |
PCT/CN2018/075030 |
371(c)(1),(2),(4) Date: |
August 28, 2018 |
PCT
Pub. No.: |
WO2019/007051 |
PCT
Pub. Date: |
January 10, 2019 |
Prior Publication Data
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|
|
|
Document
Identifier |
Publication Date |
|
US 20210183264 A1 |
Jun 17, 2021 |
|
Foreign Application Priority Data
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|
|
|
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Jul 3, 2017 [CN] |
|
|
201710534760.4 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G09B
21/007 (20130101); G09G 3/03 (20200801); G09G
3/20 (20130101); G09B 21/004 (20130101); G09G
2310/08 (20130101); G09G 2354/00 (20130101); G09G
2310/0275 (20130101); G09G 2310/0267 (20130101); G09G
2340/14 (20130101) |
Current International
Class: |
G09B
21/00 (20060101); G09G 3/00 (20060101) |
References Cited
[Referenced By]
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Foreign Patent Documents
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Apr 2015 |
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CN |
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105930014 |
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Sep 2016 |
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CN |
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105930014 |
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Sep 2016 |
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CN |
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107067893 |
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Aug 2017 |
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CN |
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2015145965 |
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Aug 2015 |
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JP |
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20130042675 |
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Apr 2013 |
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KR |
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Other References
PCT International Search Report, Application No. PCT/CN2018/075030,
dated Apr. 17, 2018, 5 pages: with English translation. cited by
applicant .
PCT Written Opinion, Application No. PCT/CN2018/075030, dated Apr.
17, 2018, 6 pages.: with English translation of relevant part.
cited by applicant .
China First Office Action, Application No. 201710534760.4, dated
Dec. 24, 2018, 25 pps.: with English translation. cited by
applicant.
|
Primary Examiner: Hong; Richard J
Attorney, Agent or Firm: Armstrong Teasdale LLP
Claims
What is claimed is:
1. A display panel comprising: a plurality of scan lines; a
plurality of data lines; and a plurality of display circuits
arranged at intersections of the plurality of scan lines and the
plurality of data lines, respectively; wherein the display circuit
comprises: a switch configured to be turned on or off according to
a scan signal from the scan line; and a dot element coupled to the
switch, wherein the dot element comprises a substrate, an electrode
provided on the substrate, a thermosensitive layer provided on the
electrode, and a dot key arranged on the thermosensitive layer;
wherein the electrode is coupled to the switch, and configured to
be applied with a data signal from the data line when the switch is
turned on; wherein the thermosensitive layer is configured to be
heated by the electrode to protrude the dot key; and wherein the
thermosensitive layer is made of a thermosensitive material, the
thermosensitive material adapted to become harder when being
heated.
2. The display panel according to claim 1, wherein the dot element
further comprises a protection layer arranged between the
thermosensitive layer and the dot key.
3. The display panel according to claim 2, wherein the protection
layer is made of a resin material.
4. The display panel according to claim 1, wherein the plurality of
display circuits is arranged in a matrix.
5. The display panel according to claim 1, wherein the switch
comprises a thin film transistor (TFT), wherein a control electrode
of the TFT is coupled to the scan line, wherein a first electrode
of the TFT is coupled to the data line, and wherein a second
electrode of the TFT is coupled to the electrode.
6. A display device comprising: a display panel according to claim
1; an information recognition unit configured to recognize input
information to generate text information; and a control unit
coupled to the information recognition unit and the display panel,
and configured to convert the text information into Braille
information to generate a drive signal for the display panel based
on the Braille information, and to provide the drive signal to the
display panel, wherein the display panel is configured to display
the Braille information according to the drive signal.
7. The display device according to claim 6, wherein the control
unit comprises: a conversion module coupled to the information
recognition unit, and configured to convert the text information
into the Braille information to determine a display circuit of the
display panel in which the corresponding dot key is to be protruded
based on the Braille information, and to generate a first control
instruction and a second control instruction; a timing control
circuit coupled to the conversion module and the display panel, and
configured to generate a scan signal according to the first control
instruction and provide the scan signal to the corresponding scan
line of the display panel; and a data drive circuit coupled to the
conversion module and the display panel, and configured to generate
a data signal according to the second control instruction and
provide the data signal to the corresponding data line of the
display panel.
8. The display device according to claim 6, wherein the information
recognition unit comprises at least one of an image recognition
element and a voice recognition element.
9. A method for displaying Braille information in a display device
according to claim 6, the method comprising: recognizing the input
information to generate the text information; converting the text
information into the Braille information; generating the drive
signal for the display panel of the display device according to the
Braille information; and driving the display panel to display the
Braille information according to the drive signal.
10. The method according to claim 9, wherein generating the drive
signal for the display panel of the display device according to the
Braille information comprises: determining a display circuit of the
display panel in which a dot key is to be protruded based on the
Braille information; generating a first control instruction and a
second control instruction according to the determined display
circuit; and generating a scan signal and a data signal for the
display panel respectively according to the first control
instruction and the second control instruction.
11. The method according to claim 9, wherein the input information
comprises at least one of image information and voice
information.
12. The method according to claim 9, wherein the control unit
comprises: a conversion module coupled to the information
recognition unit, and configured to convert the text information
into the Braille information to determine a display circuit of the
display panel in which the corresponding dot key is to be protruded
based on the Braille information, and to generate a first control
instruction and a second control instruction; a timing control
circuit coupled to the conversion module and the display panel, and
configured to generate a scan signal according to the first control
instruction and provide the scan signal to the corresponding scan
line of the display panel; and a data drive circuit coupled to the
conversion module and the display panel, and configured to generate
a data signal according to the second control instruction and
provide the data signal to the corresponding data line of the
display panel.
13. The method according to claim 9, wherein the information
recognition unit comprises at least one of an image recognition
element and a voice recognition element.
14. The display device according to claim 6, wherein the
thermosensitive layer is made of a thermosensitive material.
15. The display device according to claim 6, wherein the dot
element further comprises a protection layer arranged between the
thermosensitive layer and the dot key.
16. The display device according to claim 15, wherein the
protection layer is made of a resin material.
17. The display device according to claim 6, wherein the plurality
of display circuits is arranged in a matrix.
18. The display device according to claim 6, wherein the switch
comprises a thin film transistor (TFT), wherein a control electrode
of the TFT is coupled to the scan line, wherein a first electrode
of the TFT is coupled to the data line, and wherein a second
electrode of the TFT is coupled to the electrode.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
This patent application is a National Stage Entry of
PCT/CN2018/075030 filed on Feb. 2, 2018, which claims the benefit
and priority of Chinese Patent Application No. 201710534760.4 filed
on Jul. 3, 2017, the disclosures of which are incorporated herein
by reference in their entirety as part of the present
application.
BACKGROUND
The present disclosure relates to the field of display techniques,
and particularly, to a display panel, a display device and a method
for displaying Braille information.
Due to inherent visual defects, blind people can only acquire the
outside information through sound and touch. Thus, when a blind
person is reading, he usually acquires the text of the information
by touching the Braille information with a hand. In the traditional
techniques, protruded dots are generally prepared on paper to
enable a blind person to touch the Braille information. But in this
way, the paper with the protruded dots cannot be reused any more,
which causes serious waste of resources.
In that case, a Braille information display device for displaying
the Braille information emerges at the right moment. In the
existing Braille information display devices, the Braille
information is usually displayed by employing a mechanical control
mode, such as using the piezoelectric patches. However, this
control mode has a complicated structure and a cumbersome process,
and it is difficult to realize a fine control of braille dots.
BRIEF DESCRIPTION
The embodiments of the present disclosure provide a display panel,
a display device, and a method for displaying Braille
information.
A first aspect of the present disclosure provides a display panel,
including a plurality of scan lines, a plurality of data lines, and
a plurality of display circuits arranged at intersections of the
plurality of scan lines and the plurality of data lines,
respectively, wherein the display circuit includes a switch
configured to be turned on or off according to a scan signal from
the scan line, and a dot element coupled to the switch, wherein the
dot element includes a substrate, an electrode provided on the
substrate, a thermosensitive layer provided on the electrode, and a
dot key arranged on the thermosensitive layer, wherein the
electrode is coupled to the switch, and configured to be applied
with a data signal from the data line when the switch is turned on,
and wherein the thermosensitive layer is configured to be heated by
the electrode to protrude the dot key.
In the embodiment of the present disclosure, the thermosensitive
layer is made of a thermosensitive material.
In the embodiment of the present disclosure, the dot element
further includes a protection layer arranged between the
thermosensitive layer and the dot key.
In the embodiment of the present disclosure, the protection layer
is made of a resin material.
In the embodiment of the present disclosure, the plurality of
display circuits is arranged in a matrix.
In the embodiment of the present disclosure, the switch includes a
thin film transistor (TFT), wherein a control electrode of the TFT
is coupled to the scan line, a first electrode of the TFT is
coupled to the data line, and a second electrode of the TFT is
coupled to the electrode.
A second aspect of the present disclosure provides a display
device, including a display panel according to the first aspect of
the present disclosure, an information recognition unit configured
to recognize input information to generate text information, and a
control unit coupled to the information recognition unit and the
display panel, and configured to convert the text information into
Braille information, to generate a drive signal for the display
panel based on the Braille information, and to provide the drive
signal to the display panel, wherein the display panel is
configured to display the Braille information according to the
drive signal.
In the embodiment of the present disclosure, the control unit
includes a conversion module coupled to the information recognition
unit, and configured to convert the text information into Braille
information, to determine a display circuit of the display panel in
which the corresponding dot key is to be protruded based on the
Braille information, and to generate a first control instruction
and a second control instruction, a timing control circuit coupled
to the conversion module and the display panel, and configured to
generate a scan signal according to the first control instruction
and to provide the scan signal to the corresponding scan line of
the display panel, and a data drive circuit coupled to the
conversion module and the display panel, and configured to generate
a data signal according to the second control instruction and to
provide the data signal to the corresponding data line of the
display panel.
In the embodiment of the present disclosure, the information
recognition unit includes at least one of an image recognition
element and a voice recognition element.
A third aspect of the present disclosure provides a method for
displaying the Braille information in a display device according to
the second aspect of the present disclosure, including recognizing
input information to generate text information, converting the text
information into the Braille information, generating a drive signal
for a display panel in the display device according to the Braille
information, and driving the display panel to display the Braille
information according to the drive signal.
In the embodiment of the present disclosure, generating a drive
signal based on the Braille information includes determining a
display circuit of the display panel in which the corresponding dot
key is to be protruded based on the Braille information, generating
a first control instruction and a second control instruction
according to the determined display circuit, and generating a scan
signal and a data signal for the display panel respectively
according to the first control instruction and the second control
instruction.
In the embodiment of the present disclosure, the input information
includes at least one of image information and voice
information.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more clearly describe the technical solutions in the
embodiments of the present disclosure or in the prior art, the
drawings to be used in the embodiments of the present disclosure or
the prior art will be briefly introduced as follows. Obviously, the
drawings in the following description just illustrate some
embodiments of the present disclosure, and a person skilled in the
art can obtain other drawings from them without paying any creative
effort.
FIG. 1 illustrates a structural schematic diagram of a display
panel according to an embodiment of the present disclosure;
FIG. 2 illustrates an exemplary structural schematic diagram of a
dot element in a display panel according to an embodiment of the
present disclosure;
FIG. 3 illustrates another exemplary structural schematic diagram
of a dot element in a display panel according to an embodiment of
the present disclosure;
FIG. 4 illustrates a structural schematic diagram of a display
panel according to another embodiment of the present
disclosure;
FIG. 5 illustrates a structural schematic diagram of a display
device according to an embodiment of the present disclosure;
FIG. 6 illustrates a structural schematic diagram of a display
device according to another embodiment of the present
disclosure;
FIG. 7 illustrates a flow diagram of a method for displaying
Braille information according to an embodiment of the present
disclosure; and
FIG. 8 illustrates a flow diagram of a drive signal generation
process in the embodiment as illustrated in FIG. 7.
DETAILED DESCRIPTION
In order to make the characteristics and advantages of the
embodiments of the present disclosure more apparent and
understandable, the technical solutions of the embodiments of the
present disclosure will be clearly and completely described as
follows with reference to the drawings of the embodiments of the
present disclosure. Obviously, the embodiments described are just a
part of the embodiments of the present disclosure rather than all
of the embodiments. Based on the embodiments of the present
disclosure, any other embodiment obtained by a person skilled in
the art without paying any creative effort shall fall within the
protection scope of the present disclosure.
It should be noted that, in the drawings referred to the following
embodiments, the specific number of the display circuits included
in the illustrated display panel, as well as the specific numbers
of the switches, and the dot elements included in each display
circuit are merely illustrative, rather than limitations to the
respective actual numbers.
FIG. 1 illustrates a structural schematic diagram of a display
panel according to an embodiment of the present disclosure. As
illustrated in FIG. 1, the display panel includes a plurality of
scan lines GATE, a plurality of data lines DATA, and a plurality of
display circuits 2 arranged at intersections of the plurality of
scan lines GATE and the plurality of data lines DATA, respectively.
In which, the display circuit 2 includes a switch 3 and a dot
element 4 coupled to the switch 3. The switch 3 can be turned on or
off according to a scan signal from the scan line GATE.
FIG. 2 illustrates an exemplary structural schematic diagram of a
dot element 4 in the display panel as illustrated in FIG. 1. The
dot element 4 includes a substrate 1, an electrode 5 provided on
the substrate 1, a thermosensitive layer 6 provided on the
electrode 5, and a dot key 7 arranged on the thermosensitive layer
6. In which, the electrode 5 is coupled to the switch 3, and may be
applied with a data signal from the data line DATA when the switch
3 is turned on. The electrode 5 will be energized when being
applied with the data signal from the data line DATA, thereby the
thermosensitive layer 6 provided on the electrode 5 is heated.
Based on the characteristics of the thermosensitive layer 6, the
thermosensitive layer 6 has a soft texture when it is not heated,
and the dot key 7 arranged on the thermosensitive layer 6 is
recessed in the thermosensitive layer 6 due to its own gravity, and
when the thermosensitive layer 6 is heated to a certain
temperature, the texture of the thermosensitive layer 6 will become
hardened from soft, which causes the dot key 7 to be lifted up and
then protruded. By applying the scan signal and the data signal,
the dot keys 7 at different positions can be protruded.
The display panel provided by the embodiment of the present
disclosure may be a display panel displaying Braille characters.
The six display circuits 2 illustrated in the dashed box in FIG. 1
are corresponding to one Braille character. By applying the scan
signal and the data signal, the dot keys 7 in the display circuits
2 at different positions can be protruded, so that the display
panel displays different Braille characters. Therefore, with the
display panel provided in this embodiment, each dot key 7 can be
independently controlled, so that the control is more precise and
then the Braille information can be displayed more accurately.
In addition, in the display panel, since each dot key 7 can be
independently controlled, the area occupied by the dot key 7 can be
reduced within a reasonable range, thereby reducing the area
occupied by the display circuit 2. Since six display circuits 2 are
corresponding to one Braille character, such that the display panel
can display more Braille characters per unit area. On the other
hand, since the area occupied by a single Braille character is
reduced, the size of the display panel can be reduced to a certain
extent for the convenience of carriage and usage by the blind
persons.
It can be understood that in the display panel, each dot element 4
can be regarded as a pixel unit, and the control of the dot key 7
included in each dot element 4 can be accurate to the level of
pixel micrometer.
In the embodiment of the present disclosure, the thermosensitive
layer 6 may be formed on a surface of the electrode 5 away from the
substrate 1 by a coating process. In which, the thermosensitive
layer 6 may be made of a thermosensitive material such as gel.
Based on the characteristics of the thermosensitive material, the
thermosensitive material has a soft texture when it is not heated,
and the texture becomes hardened from soft when it is heated to a
certain temperature threshold. It can be understood that different
thermosensitive materials are corresponding to different
temperature thresholds. Moreover, when different thermosensitive
materials are heated to certain temperature thresholds, the time
required for their textures to be hardened from soft are also
different, i.e., the time from the application of the data signal
to the electrode 5 to the raising of the dot key 7 are different.
For example, the time from the application of the data signal to
the electrode 5 to the raising of the dot key 7 may be one frame
time.
In addition, the blind person needs to sense the Braille
information by means of finger touch. In order to prevent the
thermosensitive layer 6 from being damaged by the long-time finger
touch, in the embodiment of the present disclosure, as illustrated
in FIG. 3, the dot element 4 further includes a protection layer 8,
which may be arranged between the thermosensitive layer 6 and the
dot key 7 to protect the thermosensitive layer 6. In an exemplary
embodiment of the present disclosure, the protection layer 8 may be
made of a resin material.
In the embodiment of the present disclosure, the dot elements 4
included in the display circuits 2 are arranged in a matrix. In
general, one standard Braille character consists of a dot matrix of
2.times.3 dots, and each display circuit 2 represents different
Braille characters by raising the dot keys 7 at different
positions. Therefore, the applicability of the display panel is
enhanced, and the blind persons are facilitated to touch and
recognize the Braille information.
In the embodiment of the present disclosure, as illustrated in FIG.
4, the switch 3 included in each display circuit 2 may be a thin
film transistor, and it should be understood that other structure
is also possible, which is not limited herein. In an exemplary
embodiment of the present disclosure, a control electrode 31 of the
thin film transistor is coupled to the scan line GATE, a first
electrode 32 of the thin film transistor is coupled to the data
line DATA, and a second electrode 33 of the thin film transistor is
coupled to the electrode 5 in the dot element 4. A scan signal may
be provided to the control electrode of the thin film transistor
through the scan line GATE, so as to control the thin film
transistor in the row to be turned on. A data signal is provided to
the first electrode of the thin film transistor through the data
line DATA, and transmitted to the electrode 5 through the second
electrode of the thin film transistor, so that the electrode 5 is
energized. The thermosensitive layer 6 corresponding to the
electrode 5 starts to be heated, and when it is heated to a certain
temperature, the texture of the thermosensitive layer 6 becomes
hardened, so that the dot key 7 located above the thermosensitive
layer 6 is protruded.
FIG. 5 illustrates a structural schematic diagram of a display
device according to an embodiment of the present disclosure. As
illustrated in FIG. 5, the display device includes the display
panel illustrated in FIG. 1, an information recognition unit 9, and
a control unit 10.
The information recognition unit 9 can recognize input information
to generate text information. In the embodiment of the present
disclosure, the input information may include at least one of image
information and a voice information. In an exemplary embodiment of
the present disclosure, the image information (such as road
information) may be acquired by a camera in the display device, and
the voice information may be acquired by a microphone (such as a
mike) in the display device. The acquired image information may be
provided to an image recognition element for recognition, and the
acquired voice information may be provided to a voice recognition
element for recognition to generate the text information.
The control unit 10 is coupled to the information recognition unit
9 and the display panel. The control unit 10 may convert the text
information into Braille information, generate a drive signal for
the display panel based on the Braille information, and provide the
drive signal to the display panel. The display panel may display
the Braille information according to the drive signal.
In the embodiment of the present disclosure, as illustrated in FIG.
5, the control unit 10 includes a conversion module 11, a timing
control circuit 12, and a data drive circuit 13.
The conversion module 11 is coupled to the information recognition
unit 9, the timing control circuit 12, and the data drive circuit
13, respectively. The conversion module 11 may convert the
recognized text information into Braille information, determine the
display circuit 2 in the display panel in which the corresponding
dot key 7 is to be protruded based on the Braille information, and
generate a first control instruction and a second control
instruction. The first control instruction is related to the timing
of the display circuit 2, and the second control instruction is
related to the data of the display circuit 2.
The timing control circuit 12 is coupled to the conversion module
11 and the display panel. The timing control circuit 12 may
generate a scan signal according to the first control instruction,
and provide the scan signal to the corresponding scan line GATE of
the display panel. In an exemplary embodiment of the present
disclosure, the timing control circuit 12 may be coupled to the
control electrode of the switch 3 included in the display circuit 2
through the scan line GATE. The control electrode may control the
switch 3 to be turned on or off according to the scan signal.
The data drive circuit 13 is coupled to the conversion module 11
and the display panel. The data drive circuit 13 may generate a
data signal according to the second control instruction, and
provide the data signal to the corresponding data line DATA of the
display panel. In an exemplary embodiment of the present
disclosure, the data drive circuit 13 may be coupled to the first
electrode of the switch 3 included in the display circuit 2 through
the data line DATA. When the switch 3 is turned on, the data signal
is transmitted to the corresponding electrode 5 through the second
electrode of the switch 3, so that the electrode 5 is energized,
and then the thermosensitive layer 6 provided on the electrode 5 is
heated.
In the embodiment of the present disclosure, when the switch 3
included in the display circuit 2 is a thin film transistor, as
illustrated in FIG. 6, the timing control circuit 12 is coupled to
the control electrode 31 of the thin film transistor through the
scan line GATE. The timing control circuit 12 provides the scan
signal to the control electrode of the thin film transistor through
the scan line GATE, so as to control the thin film transistor to be
turned on. In an exemplary embodiment of the present disclosure,
the timing control circuit 12 may control the thin film transistors
included in the display circuits 2 to be turned on row by row.
As illustrated in FIG. 6, the data drive circuit 13 is coupled to
the first electrode of the thin film transistor. When the thin film
transistor is turned on, the data drive circuit 13 provides a data
signal to the first electrode of the thin film transistor through
the data line DATA, and the data signal is transmitted to
corresponding electrode 5 through the second electrode of the thin
film transistor, so that the electrode 5 is energized. The
thermosensitive layer 6 corresponding to the electrode 5 starts to
be heated, and when it is heated to a certain temperature, the
texture of the thermosensitive layer 6 becomes hardened, so that
the dot key 7 located above the thermosensitive layer 6 is
protruded. In an exemplary embodiment of the present disclosure,
the work principle of the control unit 10 is specifically described
through an example in which the dot key 7 in the dot element 4 in
the first row and the first column is controlled to be protruded,
and the dot key 7 in the dot element 4 in the second row and the
second column is controlled to be protruded.
Firstly, the timing control circuit 12 provides a scan signal to
the control electrodes of thin film transistors in the first row
through the scan line GATE1, and controls thin film transistors in
first row to be turned on, the data drive circuit 13 provides a
data signal to the first electrodes of thin film transistors in the
first column through the data line DATA1, and the data signal is
transmitted to the electrode 5 included in the dot element 4 in the
first row and the first column through the second electrode of the
thin film transistor, so that the electrode 5 is energized. The
thermosensitive layer 6 corresponding to the electrode 5 starts to
be heated, and when it is heated to a certain temperature, the
texture of the thermosensitive layer 6 becomes hardened, so that
the dot key 7 located above the thermosensitive layer 6 is
protruded. That is to say, the dot key 7 in the dot element 4 in
the first row and the first column is controlled to be
protruded.
Next, the timing control circuit 12 provides a scan signal to the
control electrodes of thin film transistors in the second row
through the scan line GATE2, and controls thin film transistors in
the second row to be turned on, the data drive circuit 13 provides
a data signal to the first electrodes of thin film transistors in
the second column through the data line DATA2, and the data signal
is transmitted to the electrode 5 included in the dot element 4 in
the second row and the second column through the second electrode
of the thin film transistor, so that the electrode 5 is energized.
The thermosensitive layer 6 corresponding to the electrode 5 starts
to be heated, and when it is heated to a certain temperature, the
texture of the thermosensitive layer 6 becomes hardened, so that
the dot key 7 located above the thermosensitive layer 6 is
protruded. That is to say, the dot key 7 in the dot element 4 in
the second row and the second column is controlled to be
protruded.
The display device provided in this embodiment can independently
control each dot key 7, thereby achieving a more precise control,
and displaying the Braille information more accurately. On the
other hand, the display device further includes the information
recognition unit 9 that recognizes the input information to
generate text information, and the control unit 10 that converts
the text information into Braille information, and then determines
the display circuit 2 in the display panel in which the
corresponding dot key is to be protruded based on the Braille
information. Therefore, the display device provided in this
embodiment can also convert the input information acquired from the
outside into the Braille information, so that the blind person can
better acquire the outside information.
Since each dot key 7 is independently controlled, the area occupied
by the dot key 7 can be reduced within a reasonable range. On one
hand, the display device can display more Braille characters per
unit area, and on the other hand, the size of the display device
can be reduced for the convenience of carriage and usage by the
blind persons.
FIG. 7 is a flow diagram of a method for displaying Braille
information according to an embodiment of the present disclosure.
As illustrated in FIG. 7, the method for displaying Braille
information can be applied to the display device described in the
above embodiments. In step S1, input information is recognized to
generate text information. In the embodiment of the present
disclosure, the input information may include at least one of image
information and voice information. In an exemplary embodiment of
the present disclosure, the image information (such as road
information) may be acquired by a camera, and the voice information
may be acquired by a microphone (such as a mike). The acquired at
least one of image information and voice information may be
recognized to generate the text information.
In step S2, the text information is converted into Braille
information.
In step S3, a drive signal is generated based on the Braille
information. In the embodiment of the present disclosure, the drive
signal may include a scan signal and a data signal. In an exemplary
embodiment of the present disclosure, FIG. 8 illustrates a flow
diagram of a drive signal generation process. As illustrated in
FIG. 8, in step S31, a display circuit of the display panel in
which the corresponding dot key is to be protruded is determined
based on the Braille information. In step S32, a first control
instruction and a second control instruction are generated
according to the determined display circuit. In step S33, a scan
signal and a data signal for the display panel are generated
respectively according to the first control instruction and the
second control instruction.
In step S4, the display panel in the display device is driven to
display the Braille information according to the drive signal. In
an exemplary embodiment of the present disclosure, when the switch
included in each display circuit of the display device is a thin
film transistor, a scan signal is provided to the control electrode
of corresponding thin film transistor by the scan line, so as to
control the corresponding thin film transistor to be turned on.
Next, a data signal for supplying power to the electrode is
provided to the first electrode of the corresponding thin film
transistor through the data line, and then transmitted to the
corresponding electrode through the second electrode of the thin
film transistor, so that the thermosensitive layer corresponding to
the electrode is heated and hardened to control the corresponding
dot key to be protruded.
With the method provided by the embodiment, on one hand, each dot
key can be independently controlled, so that the control is more
precise, and the Braille information can be displayed more
accurately. On the other hand, the input information acquired from
the outside can be converted into the Braille information, so that
the blind person can better acquire the outside information.
The foregoing descriptions only concern specific embodiments of the
present disclosure, while the protection scope of the present
disclosure is not limited thereto. Any variation or substitution
easily conceivable to those skilled in the art within the technical
scope revealed by the present disclosure should fall within the
protection scope of the present disclosure. Therefore, the
protection scope of the present disclosure should be determined by
the protection scope of the claims.
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